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Question : 16
Total: 26
Following compounds are given to you :
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towardsS N 2 reaction.
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towardsβ -elimination reaction.
2-Bromopentane, 2-Bromo-2-methylbutane, 1-Bromopentane
(i) Write the compound which is most reactive towards
(ii) Write the compound which is optically active.
(iii) Write the compound which is most reactive towards
Solution:
(a)
(b)
(c)
(i) These figures show that (a) contains the least steric hindrance so towards theS N 2 reaction, 1-bromopentane will be the most reactive.
(ii) Figure b of 2-bromopentane has chiral carbon in it. So, it is optically active.
(iii) Towards theβ -elimination, 2-bromo-2methylbutane will be the most reactive as it will form most stable alkene (on account of the highest number of α -hydrogens.)
(b)
(c)
(i) These figures show that (a) contains the least steric hindrance so towards the
(ii) Figure b of 2-bromopentane has chiral carbon in it. So, it is optically active.
(iii) Towards the
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